A Science News Aggregator That Covers Stories in the World Of Science And Technology.
Saturday, September 5, 2009
Super-Strong German Steel Velcro: Not for Sneakers
From Popular Science:
German-created steel fasteners can withstand loads of more than 38 tons per square meter, hook and unhook without tools.
Velcro has proved plenty useful as a quick fastener on shoes and other household items, but lacks the strength to resist fiery temperatures and powerful chemicals in industrial settings. Now German scientists have taken the hook-and-loop fastener concept and developed a Superman version, called Metaklett.
Read more ....
Mystery Solved! Find Out Why Google Used A Doodle Of A UFO On Its Search Engine
From The Daily Mail:
Google bamboozled its users today by displaying the symbol of a UFO on its search engine page.
The website featured the classic image of a flying saucer shining a beam of light onto the middle of the classic logo.
It usually displays images that mark anniversaries or key events on its home page but its selection this time seemed a total mystery.
Clicking on the link only led to the results for 'unexplained phenomena', adding to the confusion which soon spread around the world.
Read more ....
How Old Is This Internet Thing, Again?
From The Wall Street Journal:
Poor Al Gore has been teased mercilessly for supposedly claiming he invented the Internet.
But that’s not the only portion of cyber-history that’s in dispute.
Media outlets are celebrating Sept. 2 as the 40th anniversary of the day the Internet was invented. Security company Symantec even chose to ring the day in by creating a top-10 list of the most notorious online threats, with No. 1 as 2000’s “I Love You” worm, which infected an estimated 5 million computers.
Astronauts Take a Break From Busy Space Mission
Astronauts took a hard-earned break from work aboard the International Space Station Friday as they hit the midpoint of a busy mission to boost the outpost's science gear and supplies.
The 13 astronauts aboard the docked station and shuttle Discovery had a half-day off from their joint mission, time enough to gaze down at their home planet or simply enjoy flying in weightlessness.
"Sometimes, you've just got to look out the window and enjoy the view," shuttle astronaut Jose Hernandez told reporters in a televised interview this week. "It's just breathtaking and I can't describe it with words. It's just indescribable."
Read more ....
Chemical Neurowarfare
Imagine a future where the Iranian regime didn’t need to spend weeks in the streets beating, killing, and jailing protesters to put down the reform movement. Imagine in this future that the beatings would be replaced with something gentler, but ultimately more sinister: non-lethal, weaponized drugs designed to decrease aggression and increase trust.
That’s the future imagined and fretted over in an opinion piece (non-gated, samizdat version here) and editorial (PDF) in the current issue of Nature.
My Comment: Chemical weapons .... but with a twist. This is a fascinating article, and probably more real than we think.
This reminds me of an article that was published in The Telegraph last year titled .... Future wars 'to be fought with mind drugs'.
50 Things That Are Being Killed By The Internet
From The Telegraph:
The internet has wrought huge changes on our lives – both positive and negative – in the fifteen years since its use became widespread.
Tasks that once took days can be completed in seconds, while traditions and skills that emerged over centuries have been made all but redundant.
The internet is no respecter of reputations: innocent people have seen their lives ruined by viral clips distributed on the same World Wide Web used by activists to highlight injustices and bring down oppressive regimes
Read more ....
Friday, September 4, 2009
Magnetic Monopoles Detected In A Real Magnet For The First Time
(Credit: HZB / D.J.P. Morris & A. Tennant)
From Science Daily:
ScienceDaily (Sep. 4, 2009) — Researchers from the Helmholtz-Zentrum Berlin für Materialien und Energie have, in cooperation with colleagues from Dresden, St. Andrews, La Plata and Oxford, for the first time observed magnetic monopoles and how they emerge in a real material.
Results of their research are being published in the journal Science.
Read more ....
Your Brain Is Organized Like a City
From Live Science:
A big city might seem chaotic, but somehow everything gets where it needs to go and the whole thing manages to function on most days, even if it all seems a little worse for the wear at the end of the day. Sound a bit like your brain?
Neurobiologist Mark Changizi sees strikingly real similarities between the two.
Changizi and colleagues propose that cities and brains are organized similarly, and that the invisible hand of evolution has shaped the brain just as people have indirectly shaped cities. It's all driven by the need for organization and efficiency, the researchers say.
Read more ....
A Giant Fingerprint On Mars: High Res Camera Reveals Details Just 3ft Across On Red Planet
Planet print: This picture was taken in a crater near Fan in the Coprates Region of Mars. The giant fingerprint-like shape was created by possible evaporites - sediments formed by the evaporation of water
From The Daily Mail:
This striking range of dunes and craters appears to form a giant cosmic fingerprint on the surface of the Red Planet.
Scientists believe the undulating ground reveals global climate changes that took place on Mars over the past few million years.
The area is in the Coprates region, a large trough that forms part of the Valles Marineris - a system of canyons stretching thousands of miles along Mars' equator.
The whitish areas could be evaporites - mineral sediments left behind when salt water evaporates. Such deposits would be of great interest as they indicate potential habitats for past martian life.
Read more ....
Astronauts Continue Rigging ISS For Science
The 13 astronauts and cosmonauts on the space shuttle Discovery and the International Space Station took some time off Friday before plunging into preparations for the third and final spacewalk of the docked portion of their mission.
Halfway through the 13-day STS-128 mission, the two crews had accomplished two of their most important tasks - delivering NASA astronaut Stott as the replacement for Tim Kopra, also of NASA, on the space station crew, and swapping out a depleted ammonia-tank with a fresh unit containing 600 pounds of fresh coolant.
Read more ....
Prehistoric Hand Axes Older Than Once Thought
From Discovery News:
Sept. 3, 2009 -- Europe's Stone Age has taken an edgy turn. A new analysis finds that human ancestors living in what is now Spain fashioned double-edged stone cutting tools as early as 900,000 years ago, almost twice as long ago as previous estimates for this technological achievement in Europe.
If confirmed, the new dates support the idea that the manufacture and use of teardrop-shaped stone implements, known as hand axes, spread rapidly from Africa into Europe and Asia beginning roughly 1 million years ago, say geologist Gary Scott and paleontologist Luis Gibert, both of the Berkeley Geochronology Center in California.
Read more ....
Quantum Computer Slips Onto Chips
Researchers have devised a penny-sized silicon chip that uses photons to run Shor's algorithm - a well-known quantum approach - to solve a maths problem.
The algorithm computes the two numbers that multiply together to form a given figure, and has until now required laboratory-sized optical computers.
This kind of factoring is the basis for a wide variety of encryption schemes.
The work, reported in Science, is rudimentary but could easily be scaled up to handle more complex computing.
Read more ....
How 20 Popular Websites Looked When They Launched
From The Telegraph:
From Google to youtube, from craigslist to flickr - how some of today's biggest sites looked back in the early days of their existence.
Remember the days when the word Google was not interchangeable with internet? Or when every site seemed to have a Netscape icon on it? Or when Flash was still something you cleaned your floor with? Then you were clearly using the web in the mid to late 1990s when pages were rudimentary affairs containing lists of links and information.
Thanks to the waybackmachine internet archive, we're still able to see some of the Web 1.0 and Web 2.0 pioneers looked in their earliest incarnations.
Read more ....
AT&T Customers Speak Out Over Poor Service
Following yesterday’s piece on how the iPhone (or, more specifically, iPhone users) are strangling the AT&T network, I’ve been hit by a deluge of emails from customers giving me their side of the story.
It’s not a pretty picture for AT&T. Here’s just a small selection of quotes I received:
“I can’t even get service at my own home.”
“MY iPhone drops calls at least 5 times a day, sometimes 5 times on the same attempted conversation.”
“I live in Boulder but feel like I live in the middle of Montana where I can only get service by hiking the local hill.”
Read more ....
Super-Fast Computers Of The Future
From Science Daily:
ScienceDaily (Sep. 3, 2009) — Computers which use light to process large amounts of data faster than ever before are just one of many groundbreaking potential applications of a new £6 million research programme at Queen’s University Belfast and Imperial College London, launched September 1, 2009.
The Engineering and Physical Sciences Research Council (EPSRC) is funding the two universities to establish a world-leading research programme on the fundamental science of so-called ‘nanoplasmonic devices’.
Read more ....
Tipping Points: What Wall Street and Nature Have in Common
From Live Science:
When a big change is coming – be it in ocean circulation patterns, wildlife populations, or even the global economy – it is often heralded by telltale signs, scientists have found.
In many man-made and natural systems, conditions reach a tipping point when a major transition occurs and the system shifts from one state to another. Now researchers say they can begin to predict these tipping points by searching for universal early warning signs.
Read more ....
It's Official! Why Chatting To A Pretty Woman Is 'Bad For A Man's Brain'
From The Daily Mail:
It is an experience that turns many chaps into an awkward, mumbling wreck.
Now scientists have confirmed that being in the presence of a pretty woman really does scramble the male brain.
A study has revealed that men who spend just a few minutes in the company of an attractive female perform less well in tests designed to measure brain function.
Read more ....
'Optical Computer' Performs First Ever Calculation
Photo: PA
From The Telegraph:
An 'optical computer' which uses light particles rather than traditional circuitry has performed the first ever calculation, as scientists hope it could pave the way for a computer smaller and faster than anything seen before.
Scientists have hailed the step, despite the calculation taking longer than a schoolchild.
The optical quantum chip uses single particles of "whizzing" light which could eventually pave the wave for a "super-powerful quantum computer".
Read more ....
The Singularity And The Fixed Point -- A Commentary
The importance of engineering motivation into intelligence.
Some futurists such as Ray Kurzweil have hypothesized that we will someday soon pass through a singularity--that is, a time period of rapid technological change beyond which we cannot envision the future of society. Most visions of this singularity focus on the creation of machines intelligent enough to devise machines even more intelligent than themselves, and so forth recursively, thus launching a positive feedback loop of intelligence amplification. It's an intriguing thought. (One of the first things I wanted to do when I got to MIT as an undergraduate was to build a robot scientist that could make discoveries faster and better than anyone else.) Even the CTO of Intel, Justin Rattner, has publicly speculated recently that we're well on our way to this singularity, and conferences like the Singularity Summit (at which I'll be speaking in October) are exploring how such transformations might take place.
Read more ....
China Cracks Down On Stem Cell Tourism
From New Scientist:
Chinese and European researchers have today published ethical guidelines aimed at discouraging Chinese doctors from offering patients unproven or sham treatments based on stem cells.
The authors hope the move will reinforce legal curbs on stem cell treatments introduced on 1 May by China's ministry of health.
The launch follows new allegations of fraud in stem cell research, and the arrest of individuals in Hungary allegedly offering bogus treatments.
Read more ....New Hope For Aids Vaccine As Scientists Find 'Achilles Heel'
The search for an HIV vaccine has taken a major step forward with the discovery of a potential Achilles heel of the virus that causes Aids.
Two powerful antibodies that attack a vulnerable spot common to many strains of HIV have been identified, improving the prospects for a vaccine against a virus that affects an estimated 33 million people and kills over 2 million each year.
The discovery is important because it highlights a potential way around HIV’s defences against the human immune system, which have so far thwarted efforts to make a workable vaccine. The hope is that a vaccine that stimulates the production of these antibodies could remain effective against HIV even as the virus mutates.
Read more ....
Money Woes Likely To Hobble NASA's Planned Moon Mission
From McClatchy News:
WASHINGTON — NASA, whose successes helped cement America's reputation as the world's technological leader, is facing a series of money woes that could thwart its hopes of remaining the globe's leader in space exploration.
A blue-ribbon presidential panel is expected to advise the White House later this month that returning astronauts to the moon by 2020, as former President George W. Bush proposed, is financially impossible under NASA's $18.7 billion budget.
Read more ....
1000 MPH or Bust: Behind the Scenes With Supersonic Car Tech
From Popular Mechancis:
A series of successful rocket tests in the Mojave desert recently marks another step in the development of a car built to reach 1000 mph. The British team Bloodhound Supersonic Car (SSC) is comprised of some legendary land speed experience. Richard Noble was the man behind the Thrust SSC—the car that set the current land speed record. And the man that will slide behind the wheel of the Bloodhound is Andy Green, the former fighter pilot who holds the land speed record for the fastest diesel vehicle in the world (just over 350 mph, back in 2006). We met with the team recently to get a sense of the scope of the Bloodhound project and the challenges that lie ahead on the road to 1000 mph.
Read more ....
Study Finds Prime Time On The Internet Is 11 p.m.
From Christian Science Monitor:
According to a study, North Americans have been staying up late to do their Internet surfing this summer, so late that the peak usage for the whole day has been at 11 p.m. Eastern time.
It’s 11 p.m. Do you know where your neighbors are?
Chances are they’re online. According to a study, North Americans have been staying up late to do their Internet surfing this summer, so late that the peak usage for the whole day has been at 11 p.m. Eastern time.
That appears to be a shift from previous years, when most Internet activity was in the daytime.
Read more ....
Thursday, September 3, 2009
Diesel Exhaust Is Linked To Cancer Development Via New Blood Vessel Growth
From Science Daily:
ScienceDaily (Sep. 2, 2009) — Scientists have demonstrated that the link between diesel fume exposure and cancer lies in the ability of diesel exhaust to induce the growth of new blood vessels that serve as a food supply for solid tumors.
The researchers found that in both healthy and diseased animals, more new blood vessels sprouted in mice exposed to diesel exhaust than did in mice exposed to clean, filtered air. This suggests that previous illness isn’t required to make humans susceptible to the damaging effects of the diesel exhaust.
Read more ....
Eating At Night May Put On Pounds
From Live Science:
When you eat, not just what you eat, can affect your weight, a new study on mice suggests.
Mice that were fed a high-fat diet during the time they'd normally eat — the regular hours in their daily circadian cycle — gained 20 percent in weight over six weeks. But mice fed the same high-fat diet during hours they should have been sleeping put on 48 percent compared to the weight they started with.
While the results would have to be replicated on humans to see if the effects are the same, researchers suspect they are.
Read more ....
The 15 Biggest Wikipedia Blunders
Wikipedia's just announced plans to restrict the editing of some of its articles. Under the new system, any changes made to pages of still-living people will have to be approved by an "experienced volunteer" before going online.
The change marks a significant shift in the philosophy of the openly edited user-controlled encyclopedia -- and that may not be a bad thing. Here are 15 of the biggest Wikipedia blunders the new editing system might have prevented. These false facts, according to widely published accounts, all appeared on the Wikipedia site at some point.
Read more ....
New Microprocessor Runs On Thin Air
From The New Scientist:
There's no shortage of ways to perform calculations without a standard electronic computer. But the latest in a long lineMovie Camera of weird computers runs calculations on nothing more than air.
The complicated nest of channels and valves (see image) made by Minsoung Rhee and Mark Burns at the University of Michigan, Ann Arbor, processes binary signals by sucking air out of tubes to represent a 0, or letting it back in to represent a 1.
A chain of such 1s and 0s flows through the processor's channels, with pneumatic valves controlling the flow of the signals between channels.
Read more ....
A Dental Filling Made From Bile And Silica
Science Photo Library/Photo Researchers; © Thomas J. Peterson/Getty Images; iStock
From Popular Science:
The ancient Greeks thought an excess of bile could make you angry or melancholy, but Julian Zhu thinks the digestive juice could improve your smile. Zhu, a chemist at the University of Montreal, hit upon the idea while developing a bile-acid-based gel for tissue repair. He found that combining modified bile acids with silica created a hard plastic—perfect for patching broken pearly whites. The bile plastic matches the durability of plastic composite fillings and is more resistant to cracks. And it doesn’t leach mercury, as many commonly used metal fillings do. Bile occurs naturally in the body, so it wouldn’t cause any harm if the fillings were to decompose over time.
Read more ....
Google's Gmail Goof-Up
The Web company initially offered little explanation for its e-mail failure; government may think twice before trusting it with vital tasks, says Computerworld.
It's too bad the National Transportation Safety Board can't investigate Google to find out just why Gmail crashed Tuesday as Google's explanations for its outages (via its dashboard) are short and kindergarten-like.
The NTSB would seek out the root cause of the outage, hold hearings and issue a report with recommendations for fixing the problem. But Google follows the standard operating practice of cloud and SaaS (Software-as-a-Service) providers, and that is to tell customers as little as possible about an outage. They treat their customers like dumb bunnies.
Read more ....
Update: Google Explains Why You Didn’t Have Gmail -- Epicenter/Wired
Global Warming Could Forestall Ice Age
From The New York Times:
The human-driven buildup of heat-trapping greenhouse gases in the atmosphere appears to have ended a millenniums-long slide toward cooler summer temperatures in the Arctic, the authors of a new study report.
Scientists familiar with the work, to be published Friday in the journal Science, said it provides fresh evidence that human activity is not only warming the globe, particularly the Arctic, but could even fend off what had been presumed to be an inevitable descent into a new ice age over the next several dozen millenniums.
The reversal of the slow cooling trend in the Arctic, recorded in samples of layered lakebed mud, glacial ice and tree rings from Alaska to Siberia, has been swift and pronounced, the team writes.
Read more ....
Arctic reverses trend, is warmest in two millennia -- AP
Arctic now warmest in 2000 years, researchers say -- Reuters
Human Activity Blamed in Reversal of Cooling in Arctic -- Washington Post
Next Ice Age Delayed by Global Warming, Study Says -- National Geographic
Arctic Temperatures Are Warmest in 2,000 Years -- Live Science
Recent Arctic warming follows centuries of natural cooling -- CBC
Arctic ice reveals last decade was hottest in 2,000 years -- Daily Mail
Telegraphs Ran on Electric Air in Crazy 1859 Magnetic Storm
From Wired Science:
On Sept. 2, 1859, at the telegraph office at No. 31 State Street in Boston at 9:30 a.m., the operators’ lines were overflowing with current, so they unplugged the batteries connected to their machines, and kept working using just the electricity coursing through the air.
In the wee hours of that night, the most brilliant auroras ever recorded had broken out across the skies of the Earth. People in Havana and Florida reported seeing them. The New York Times ran a 3,000 word feature recording the colorful event in purple prose.
Read more ....
Will Kepler Find Habitable Moons?
From Science Daily:
ScienceDaily (Sep. 3, 2009) — Since the launch of the NASA Kepler Mission earlier this year, astronomers have been keenly awaiting the first detection of an Earth-like planet around another star. Now, in an echo of science fiction movies a team of scientists led by Dr David Kipping of University College London thinks that they may even find habitable ‘exomoons,’ too.
The new results will appear in a paper in Monthly Notices of the Royal Astronomical Society.
Read more ....
New Origin of Life Proposed: Zinc & Zap
From Live Science:
The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, was capable of producing amino acids, the building blocks of life, from inorganic substances.
Now, more than 55 years later, two scientists are proposing a hypothesis that could add a new dimension to the debate on how life on Earth developed.
Read more ....
Cairo Slums Get Energy Makeover
From National Geographic:
In the ghettos of Egypt's largest city, solar panels are sprouting on apartment rooftops, providing residents with clean power and water and a chance to directly improve their lives.
Since 2003 the nonprofit Solar CITIES project has installed 34 solar-powered hot water systems and 5 biogas reactors in Cairo's poor Coptic Christian and Islamic neighborhoods.
Read more ....
NASA Monitoring Space Junk; May Need to Move ISS
From Daily Tech:
The U.S. space agency is monitoring a piece of space junk that could impact the ISS
NASA is now monitoring a piece of space trash that may force a shift in position for the International Space Station and shuttle Discovery, which is currently docked at the ISS.
An old piece of metal from the Ariane 5 rocket body will fly by the ISS sometime on Friday, with it reaching its closest point just 6.2 miles away from the ISS. The size of the space junk remains unknown, though a decision will be made later this evening.
Read more ....
'Telepathic' Microchip Could Help Paraplegics Control Computers
From The Telegraph:
A 'telepathic' microchip that enables paraplegics to control computers has been developed by Dr Jon Spratley, a British scientist.
The chip is implanted onto the surface of the brain, where it monitors electronic 'thought' pulses.
While paraplegics may be unable to move their limbs, their brains still produce an electronic signal when they try.
Read more ....
Ancient Wall Found In Jerusalem
A 3,700-year-old wall has been discovered in east Jerusalem, Israeli archaeologists say.
The structure was built to protect the city's water supply as part of what dig director Ronny Reich described as the region's earliest fortifications.
The 26-ft (8-m) high wall showed the Canaanite people who built it were a sophisticated civilisation, he said.
Critics say Israel uses such projects as a political tool to bolster Jewish claims to occupied Palestinian land.
Excavations at the site, known as the City of David, are in a Palestinian neighbourhood just outside the walls of Jerusalem's old city.
Read more ....
Star Wars As Andromeda Galaxy Devours Its Neighbour
From The Daily Mail:
British astronomers have captured the first ever images of a cannibalistic galaxy of stars 'consuming' another.
The remarkable photographs showing the giant Andromeda galaxy 'devouring' a smaller star formation is described by experts as the 'Holy Grail' of space photography.
Stargazers have long known that Andromeda, which lies approximately 2.5 million light years away, has grown by 'feeding' on other clusters, But this is the first time that its expansion has been caught on camera.
Read more ....
13 More Things That Don't Make Sense
Strive as we might to make sense of the world, there are mysteries that still confound us.
Here are thirteen of the most perplexing. Cracking any one of them could yield profound truths.
Read more ....
How Science Can Create Millions of New Jobs
From Business Week:
Reigniting basic research can repair the broken U.S. business model and put Americans back to work .
Name an industry that can produce 1 million new, high-paying jobs over the next three years. You can't, because there isn't one. And that's the problem.
America needs good jobs, soon. We need 6.7 million just to replace losses from the current recession, then an additional 10 million to keep up with population growth and to spark demand over the next decade. In the 1990s the U.S. economy created a net 22 million jobs, or 2.2 million a year. But from 2000 to the end of 2007, the rate plunged to 900,000 a year. The pipeline is dry because the U.S. business model is broken. Our growth engine has run out of a key fuel—basic research.
Read more ....
The First "Clown" Going To Space
Space tourist launches to ISS on Sept. 30
Canada's first space tourist will blast off into space as part of a three-man supply crew on Sept. 30.
Cirque du Soleil founder Guy Laliberté, NASA astronaut Jeff Williams and Russian cosmonaut Maxim Suraev are scheduled to launch on a Russian Soyuz spacecraft from the Baikonur Cosmodrome in Kazakhstan.
"I think this is a great, great opportunity of inspiration and I intend to inspire myself as much as possible," said Laliberté, speaking from the Johnson Space Centre in Houston.
Read more ....
'First clown in space' has serious mission goals -- AP
The future first clown in space to advocate for water -- AFP
Circus billionaire plans show from space -- Reuters
Space clown plans global show -- MSNBC
Cirque boss's space trip to have serious message - aside from the clown nose -- Canadian Press
Cirque du Soleil show in space -- BBC
Cirque du Soleil chief outlines 'poetic' space mission -- CNET
Big Artistic Performance to Be Set in Space -- Space.com
Laliberté flying without a nyet -- Montreal Gazette
U2 to participate in “Moving Stars and Earth for Water” event -- U2Log
Wednesday, September 2, 2009
Giant Galaxy Hosts Most Distant Supermassive Black Hole
From Science Daily:
ScienceDaily (Sep. 2, 2009) — University of Hawaii (UH) astronomer Dr. Tomotsugu Goto and colleagues have discovered a giant galaxy surrounding the most distant supermassive black hole ever found. The galaxy, so distant that it is seen as it was 12.8 billion years ago, is as large as the Milky Way galaxy and harbours a supermassive black hole that contains at least a billion times as much matter as our Sun.
Read more ....
FAQ: The Science And History Of Wildfires
From Live Science:
The Station Fire, the largest of eight wildfires roaring through parts of California, began on Aug. 26 and has since burned more than 140,000 acres of land within the Angeles National Forest and near the surrounding foothill communities of La Canada-Flintridge, La Crescenta, Acton, Soledad Canyon, Pasadena and Glendale.
Here's what's behind this fire and others, and how this fire season stacks up to history:
Read more ....
Future Robot Soldiers?
Raytheon Company’s research facility in Salt Lake City, Utah, is developing a robotic suit for the soldier of tomorrow. The exoskeleton is essentially a wearable robot that amplifies its wearer’s strength, endurance and agility. Reminiscent of super heroes depicted in comic books and Hollywood movies, the bleeding edge technology effectively blurs the lines between science fiction and reality. So much so, that Popular Science magazine recently likened Raytheon’s exoskeleton to the “Iron Man”® depicted in the blockbuster movie of the same name.
Read more ....
My Comment: Watch the YouTube video .... I am impressed.
Studying Ancient Man To Learn To Prevent Disease
From The Philadelphia Inquirer:
Health care as we know it didn't exist 3,000 years ago. But along the Georgia coast, the Pacific Northwest, and coastal Brazil, people grew tall and strong and lived relatively free of disease. They ate game, fish, shellfish, and wild plants.
But as corn farming spread through various regions of the Americas, people got shorter. Many became prone to anemia and began dying of tuberculosis and other infectious diseases.
Read more ....
As Wildfire Threatens L.A., Satellites And Supertankers Hover
From Popular Science:
Los Angelenos have recently watched billowing clouds from a nearby wildfire hover overhead, in scenes reminiscent of "Volcano." NASA's Terra satellite took the opportunity to snap a photo of the smoke monster on the night of August 30. Red outlines in the photo indicate wildfire hotspots.
Read more ....
Milk Drinking Started Around 7,500 Years Ago In Central Europe
From Science Daily:
ScienceDaily (Sep. 1, 2009) — The ability to digest the milk sugar lactose first evolved in dairy farming communities in central Europe, not in more northern groups as was previously thought, finds a new study led by UCL (University College London) scientists published in the journal PLoS Computational Biology.
The genetic change that enabled early Europeans to drink milk without getting sick has been mapped to dairying farmers who lived around 7,500 years ago in a region between the central Balkans and central Europe.
Read more ....
Dogs Descended From Wolf Pack On Yangtze River
From The Telegraph:
Today's dogs are all descended from a pack of wolves tamed 16,000 years ago on the shores of the Yangtze river, according to new research.
It was previously known that the birthplace of the dog was eastern Asia but historians were not able to be more precise than that.
However, now researchers have made a number of new discoveries about the history of man's best friend - including that the dog appeared about 16,000 years ago south of the Yangtze river in China.
Read more ....
We Are All Mutants Say Scientists
Each of us has at least 100 new mutations in our DNA, according to research published in the journal Current Biology.
Scientists have been trying to get an accurate estimate of the mutation rate for over 70 years.
However, only now has it been possible to get a reliable estimate, thanks to "next generation" technology for genetic sequencing.
Read more ....
Discovery Of Novel Genes Could Unlock Mystery Of What Makes Us Uniquely Human
(Credit: iStockphoto/Warwick Lister-Kaye)
From Science Daily:
ScienceDaily (Sep. 2, 2009) — Humans and chimpanzees are genetically very similar, yet it is not difficult to identify the many ways in which we are clearly distinct from chimps. In a study published online in Genome Research, scientists have made a crucial discovery of genes that have evolved in humans after branching off from other primates, opening new possibilities for understanding what makes us uniquely human.
Read more ....
What Happens When an Astronaut Sneezes?
From Live Science:
Best to do the sneezing inside a shuttle or the space station, not on a spacewalk, when it can get real messy, with goo sprayed all over the inside of the helmet's "windshield."
Lately astronauts have been complaining about stuffy heads up there on the International Space Station. NASA doesn't think they have colds, though. Rather, the effects have more to do with pockets of carbon dioxide generated when they gather in groups, space station flight controller Heather Rarick said.